Re: Birmingham self-centering 4-jaw chuck
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Instead of the impact wrench, try hanging a weight off the end of a big wrench clamped on that bolt, and give it a shot of your favorite penetrating oil. I've successfully used both WD-40 and PBBlaster for that. I wasn't? in a hurry. Took a couple of days. I'd spray it every time I walked past it.?
Bill in OKC?
William R. Meyers, MSgt, USAF(Ret.)
Aphorisms to live by: Good judgement comes from experience. Experience comes from bad judgement.? SEMPER GUMBY!
Expect in one hand, expectorate in the other. See which one gets full first.
On Thursday, January 16, 2025 at 09:16:05 AM CST, Dennis LaMonica via groups.io <dennislamonica@...> wrote:
Looks like a threaded chuck with a set screw against the threads to prevent unscrewing when the lathe is reversed. The chuck may be stuck. Do not use the back gears to lock the spindle. You may break teeth.? If it is a threaded chuck, place the spindle in "neutral" so that the chuck and spindle turn free. Chuck up a large diameter bolt like 1/2-3/4" (12mm +) and use an impact wrench in reverse to break the chuck free.??
Dennis
-- Dennis western NY, USA
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Bill in OKC too